| 초록 |
In this study, Ruddlesden-Popper oxide with in situ exsolved alloy nanoparticles (NPs) is developed as fuel electrode of Solid oxide cells (SOCs). This electrode catalyst was prepared by in situ annealing of perovskite oxide in reducing atmosphere. The XRD and microscopic analyses such as SEM, TEM and EELS were conducted to examine the phase transition and exsolution of alloy NPs. The XPS and H2-TPR analyses were performed to investigate the reduction behaviors of perovskite oxide during exsolution process. The electrode catalyst exhibited high current densities for reactions of the fuel oxidation (H2, CO, and syngas), as well as electrolysis reaction of CO2; Furthermore, long-term stability test under constant current conditions showed no significant degradation of the electrochemical performance in both operating modes, indicating the robust characteristic of this catalyst as fuel electrode. |
